PITTSBURGH, June 22, 2011 – Young people who identify themselves as gay, lesbian or bisexual, experience same-sex attractions or engage in same-sex sexual behaviors are more likely to experience sexual abuse, parental physical abuse and bullying from peers than other youth, according to a University of Pittsburgh Graduate School of Public Health study.

“The higher rates of abuse experienced by sexual minority youths are clearly one of the driving mechanisms underlying higher rates of mental health problems, substance use, risky sexual behavior and HIV by sexual minority adolescents and adults,” said Mark S. Friedman, Ph.D., assistant professor of behavioral and community health sciences. “However, I cannot stress enough that these youth experience sexual and physical abuse and bullying because they identify as gay, lesbian or bisexual or experience same-sex attraction; abuse does not ‘cause’ sexual orientation or identification.”

Friedman and his co-authors conducted a meta-analysis of 37 studies in 18 geographic areas that compared the likelihood of self-reported childhood sexual abuse, physical abuse perpetrated by a parent or guardian or peer victimization between high-school aged sexual minority and non-minority youth. The meta-analysis only included school-based studies conducted in North America of randomly sampled youth.

Many studies have suggested that young people who identify as gay, lesbian or bisexual, experience same-sex attractions or engage in same-sex sexual activity are more likely to experience sexual or physical abuse or bullying from peers than other youth. However, these studies vary in effect sizes, sampling and recruitment strategies, measurements and other issues. Therefore, Friedman and his team chose to conduct a meta-analysis, a complex statistical procedure that combines the results of multiple studies.

According to the meta-analysis, sexual minority youth are:

Nearly three times more likely to report childhood sexual abuse, compared with other adolescents

1.3 times more likely to report parental physical abuse than other adolescents

1.7 times more likely to report being threatened or injured with a weapon, or otherwise assaulted as compared to their peers

Nearly three times more likely to report missing school because they were afraid

According to the report, children and adolescents who experience sexual and parental physical abuse are more likely to suffer from psychological, substance abuse, behavioral and criminal problems. Those who are abused and assaulted by peers are more likely to experience poor school performance, delinquency, social isolation, psychological and substance abuse problems and other issues, the study said.

“We need to continue our research to examine how the abuse and mistreatment these young people endure is connected to the risky behaviors they might engage in and, of great importance, programs to prevent such abuse are urgently needed,” Friedman said.

The study was funded by the National Institute of Mental Health.

Co-authors include Michael P. Marshal, Ph.D., Thomas E. Guadamuz, Ph.D., Chongyi Wei, Dr.P.H., and Ron Stall, Ph.D., all of the University of Pittsburgh Graduate School of Public Health, Department of Behavioral and Community Health Sciences and the Center for Research on Health and Sexual Orientation; Carolyn F. Wong, Ph.D., of the Children’s Hospital Los Angeles; and Elizabeth Saewyc, Ph.D., of the University of British Columbia School of Nursing.

The University of Pittsburgh Graduate School of Public Health (GSPH), founded in 1948 and now one of the top-ranked schools of public health in the United States, conducts research on public health and medical care that improves the lives of millions of people around the world. GSPH is a leader in devising new methods to prevent and treat cardiovascular diseases, HIV/AIDS, cancer and other important public health issues. For more information about GSPH, visit the school’s Web site at http://www.publichealth.pitt.edu.

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